search for: math64

...9dcd 100644 > --- a/arch/x86/entry/vdso/vclock_gettime.c > +++ b/arch/x86/entry/vdso/vclock_gettime.c > @@ -17,6 +17,7 @@ > #include <asm/unistd.h> > #include <asm/msr.h> > #include <asm/pvclock.h> > +#include <asm/mshyperv.h> > #include <linux/math64.h> > #include <linux/time.h> > #include <linux/kernel.h> > @@ -141,6 +142,49 @@ static notrace u64 vread_pvclock(int *mode) > return last; > } > #endif > +#ifdef CONFIG_HYPERV_CLOCK > +/* (a * b) >> 64 implementation */ > +static inline u6...

...9dcd 100644 > --- a/arch/x86/entry/vdso/vclock_gettime.c > +++ b/arch/x86/entry/vdso/vclock_gettime.c > @@ -17,6 +17,7 @@ > #include <asm/unistd.h> > #include <asm/msr.h> > #include <asm/pvclock.h> > +#include <asm/mshyperv.h> > #include <linux/math64.h> > #include <linux/time.h> > #include <linux/kernel.h> > @@ -141,6 +142,49 @@ static notrace u64 vread_pvclock(int *mode) > return last; > } > #endif > +#ifdef CONFIG_HYPERV_CLOCK > +/* (a * b) >> 64 implementation */ > +static inline u6...

Hi, Hyper-V TSC page clocksource is suitable for vDSO, however, the protocol defined by the hypervisor is different from VCLOCK_PVCLOCK. I implemented the required support re-using pvclock_page VVAR. Simple sysbench test shows the following results: Before: # time sysbench --test=memory --max-requests=500000 run ... real 1m22.618s user 0m50.193s sys 0m32.268s After: # time sysbench

Hi, Hyper-V TSC page clocksource is suitable for vDSO, however, the protocol defined by the hypervisor is different from VCLOCK_PVCLOCK. I implemented the required support re-using pvclock_page VVAR. Simple sysbench test shows the following results: Before: # time sysbench --test=memory --max-requests=500000 run ... real 1m22.618s user 0m50.193s sys 0m32.268s After: # time sysbench

...nsertions(+), 5 deletions(-) diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c index 85bbac9..44a6323 100644 --- a/fs/btrfs/free-space-cache.c +++ b/fs/btrfs/free-space-cache.c @@ -20,6 +20,7 @@ #include <linux/sched.h> #include <linux/slab.h> #include <linux/math64.h> +#include <linux/ratelimit.h> #include "ctree.h" #include "free-space-cache.h" #include "transaction.h" @@ -337,11 +338,12 @@ int __load_free_space_cache(struct btrfs_root *root, struct inode *inode, gen = addr; if (*gen != BTRFS_I(inode)->g...

...vdso/vclock_gettime.c index 9d4d6e1..93e9dcd 100644 --- a/arch/x86/entry/vdso/vclock_gettime.c +++ b/arch/x86/entry/vdso/vclock_gettime.c @@ -17,6 +17,7 @@ #include <asm/unistd.h> #include <asm/msr.h> #include <asm/pvclock.h> +#include <asm/mshyperv.h> #include <linux/math64.h> #include <linux/time.h> #include <linux/kernel.h> @@ -141,6 +142,49 @@ static notrace u64 vread_pvclock(int *mode) return last; } #endif +#ifdef CONFIG_HYPERV_CLOCK +/* (a * b) >> 64 implementation */ +static inline u64 mul64x64_hi(u64 a, u64 b) +{ + u64 a_lo, a_hi, b_...

...vdso/vclock_gettime.c index 9d4d6e1..4af10b4 100644 --- a/arch/x86/entry/vdso/vclock_gettime.c +++ b/arch/x86/entry/vdso/vclock_gettime.c @@ -17,6 +17,7 @@ #include <asm/unistd.h> #include <asm/msr.h> #include <asm/pvclock.h> +#include <asm/mshyperv.h> #include <linux/math64.h> #include <linux/time.h> #include <linux/kernel.h> @@ -32,6 +33,11 @@ extern u8 pvclock_page __attribute__((visibility("hidden"))); #endif +#ifdef CONFIG_HYPERV_TSCPAGE +extern u8 hvclock_page + __attribute__((visibility("hidden"))); +#endif + #ifndef BU...

...5a 100644 > --- a/lib/string_helpers.c > +++ b/lib/string_helpers.c > @@ -4,6 +4,7 @@ > * Copyright 31 August 2008 James Bottomley > * Copyright (C) 2013, Intel Corporation > */ > +#include <linux/bug.h> > #include <linux/kernel.h> > #include <linux/math64.h> > #include <linux/export.h> > @@ -14,7 +15,8 @@ > > /** > * string_get_size - get the size in the specified units > - * @size: The size to be converted > + * @size: The size to be converted in blocks > + * @blk_size: Size of the block (use 1 for si...

...5a 100644 > --- a/lib/string_helpers.c > +++ b/lib/string_helpers.c > @@ -4,6 +4,7 @@ > * Copyright 31 August 2008 James Bottomley > * Copyright (C) 2013, Intel Corporation > */ > +#include <linux/bug.h> > #include <linux/kernel.h> > #include <linux/math64.h> > #include <linux/export.h> > @@ -14,7 +15,8 @@ > > /** > * string_get_size - get the size in the specified units > - * @size: The size to be converted > + * @size: The size to be converted in blocks > + * @blk_size: Size of the block (use 1 for si...

.../gpu/drm/drm_dp_mst_topology.c @@ -28,6 +28,13 @@ #include <linux/sched.h> #include <linux/seq_file.h> +#if IS_ENABLED(CONFIG_DRM_DEBUG_DP_MST_TOPOLOGY_REFS) +#include <linux/stackdepot.h> +#include <linux/sort.h> +#include <linux/timekeeping.h> +#include <linux/math64.h> +#endif + #include <drm/drm_atomic.h> #include <drm/drm_atomic_helper.h> #include <drm/drm_dp_mst_helper.h> @@ -1405,12 +1412,189 @@ drm_dp_mst_put_port_malloc(struct drm_dp_mst_port *port) } EXPORT_SYMBOL(drm_dp_mst_put_port_malloc); +#if IS_ENABLED(CONFIG_DRM_DEBUG_...

.../gpu/drm/drm_dp_mst_topology.c @@ -28,6 +28,13 @@ #include <linux/sched.h> #include <linux/seq_file.h> +#if IS_ENABLED(CONFIG_DRM_DEBUG_DP_MST_TOPOLOGY_REFS) +#include <linux/stackdepot.h> +#include <linux/sort.h> +#include <linux/timekeeping.h> +#include <linux/math64.h> +#endif + #include <drm/drm_atomic.h> #include <drm/drm_atomic_helper.h> #include <drm/drm_dp_mst_helper.h> @@ -1399,12 +1406,187 @@ drm_dp_mst_put_port_malloc(struct drm_dp_mst_port *port) } EXPORT_SYMBOL(drm_dp_mst_put_port_malloc); +#if IS_ENABLED(CONFIG_DRM_DEBUG_...

Hi gang, Here''s some trivial cleanups that I''ve built up while reading through the code. They''ve been run through xfstests -g quick. - z -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html

...#include <drm/drm_crtc.h> > -#include <drm/drm_crtc_helper.h> > +#include <drm/drm_probe_helper.h> This file doesn't use the probe helpers, you can drop this. > #include <drm/drm_mode.h> > #include <drm/drm_plane_helper.h> > #include <linux/math64.h> [snip] > diff --git a/drivers/gpu/drm/omapdrm/omap_drv.h > b/drivers/gpu/drm/omapdrm/omap_drv.h index bd7f2c227a25..513ae8ab5e64 > 100644 > --- a/drivers/gpu/drm/omapdrm/omap_drv.h > +++ b/drivers/gpu/drm/omapdrm/omap_drv.h > @@ -23,7 +23,7 @@ > #include <linux/work...

Hi, Hyper-V TSC page clocksource is suitable for vDSO, however, the protocol defined by the hypervisor is different from VCLOCK_PVCLOCK. Implemented the required support. Simple sysbench test shows the following results: Before: # time sysbench --test=memory --max-requests=500000 run ... real 1m22.618s user 0m50.193s sys 0m32.268s After: # time sysbench --test=memory

Hi, Hyper-V TSC page clocksource is suitable for vDSO, however, the protocol defined by the hypervisor is different from VCLOCK_PVCLOCK. Implemented the required support. Simple sysbench test shows the following results: Before: # time sysbench --test=memory --max-requests=500000 run ... real 1m22.618s user 0m50.193s sys 0m32.268s After: # time sysbench --test=memory

Hi all, this patch series introduces stolen ticks accounting for Xen on ARM. Stolen ticks are clocksource ticks that have been "stolen" from the cpu, typically because Linux is running in a virtual machine and the vcpu has been descheduled. To account for these ticks we introduce CONFIG_PARAVIRT and pv_time_ops so that we can make use of:

Hi, merge window is about to close so I hope it's OK to make another try here. Changes since v2: - Add explicit READ_ONCE() to not rely on 'volatile' [Andy Lutomirski] - rdtsc() -> rdtsc_ordered() [Andy Lutomirski] - virt_rmb() -> smp_rmb() [Thomas Gleixner, Andy Lutomirski] Thomas, Andy, it seems the only blocker for the series was the ambiguity with TSC page read algorithm.

Hi, merge window is about to close so I hope it's OK to make another try here. Changes since v2: - Add explicit READ_ONCE() to not rely on 'volatile' [Andy Lutomirski] - rdtsc() -> rdtsc_ordered() [Andy Lutomirski] - virt_rmb() -> smp_rmb() [Thomas Gleixner, Andy Lutomirski] Thomas, Andy, it seems the only blocker for the series was the ambiguity with TSC page read algorithm.

Hi, while we're still waiting for a definitive ACK from Microsoft that the algorithm is good for SMP case (as we can't prevent the code in vdso from migrating between CPUs) I'd like to send v2 with some modifications to keep the discussion going. Changes since v1: - Document the TSC page reading protocol [Thomas Gleixner]. - Separate the TSC page reading code from

Hi, while we're still waiting for a definitive ACK from Microsoft that the algorithm is good for SMP case (as we can't prevent the code in vdso from migrating between CPUs) I'd like to send v2 with some modifications to keep the discussion going. Changes since v1: - Document the TSC page reading protocol [Thomas Gleixner]. - Separate the TSC page reading code from